NM_003254.3:c.322A>T

Variant names:

• chrX-47585325-A-T
• rs886136735
• NM_003254.3:c.322A>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_003254.3(TIMP1):​c.322A>T​(p.Ile108Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000182 in 1,097,914 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0000018 (0 hom. 0 hem.)
• Consequence: TIMP1 NM_003254.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.140
• Publications: 2 publications found

Genes affected

TIMP1 (HGNC:11820): (TIMP metallopeptidase inhibitor 1) This gene belongs to the TIMP gene family. The proteins encoded by this gene family are natural inhibitors of the matrix metalloproteinases (MMPs), a group of peptidases involved in degradation of the extracellular matrix. In addition to its inhibitory role against most of the known MMPs, the encoded protein is able to promote cell proliferation in a wide range of cell types, and may also have an anti-apoptotic function. Transcription of this gene is highly inducible in response to many cytokines and hormones. In addition, the expression from some but not all inactive X chromosomes suggests that this gene inactivation is polymorphic in human females. This gene is located within intron 6 of the synapsin I gene and is transcribed in the opposite direction. [provided by RefSeq, Jul 2008]

SYN1 (HGNC:11494): (synapsin I) This gene is a member of the synapsin gene family. Synapsins encode neuronal phosphoproteins which associate with the cytoplasmic surface of synaptic vesicles. Family members are characterized by common protein domains, and they are implicated in synaptogenesis and the modulation of neurotransmitter release, suggesting a potential role in several neuropsychiatric diseases. This member of the synapsin family plays a role in regulation of axonogenesis and synaptogenesis. The protein encoded serves as a substrate for several different protein kinases and phosphorylation may function in the regulation of this protein in the nerve terminal. Mutations in this gene may be associated with X-linked disorders with primary neuronal degeneration such as Rett syndrome. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

SYN1 Gene-Disease associations (from GenCC):

• X-linked complex neurodevelopmental disorder

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• epilepsy, X-linked 1, with variable learning disabilities and behavior disorders

  Inheritance: XL Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics, Laboratory for Molecular Medicine, G2P
• intellectual disability, X-linked 50

  Inheritance: XL Classification: STRONG Submitted by: PanelApp Australia

ENSG00000283743 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003254.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TIMP1	NM_003254.3	MANE Select	c.322A>T	p.Ile108Phe	missense	Exon 4 of 6	NP_003245.1	P01033
	SYN1	NM_006950.3	MANE Select	c.775-7824T>A		intron	N/A	NP_008881.2	P17600-1
	SYN1	NM_133499.2		c.775-7824T>A		intron	N/A	NP_598006.1	P17600-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TIMP1	ENST00000218388.9	TSL:1 MANE Select	c.322A>T	p.Ile108Phe	missense	Exon 4 of 6	ENSP00000218388.4	P01033
	TIMP1	ENST00000456754.6	TSL:1	c.322A>T	p.Ile108Phe	missense	Exon 4 of 4	ENSP00000406671.2	Q5H9B5
	SYN1	ENST00000295987.13	TSL:2 MANE Select	c.775-7824T>A		intron	N/A	ENSP00000295987.7	P17600-1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 0.00000182 AC: 2 AN: 1097914 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 363302

African (AFR) AF: 0.00 AC: 0 AN: 26398

American (AMR) AF: 0.00 AC: 0 AN: 35186

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19372

East Asian (EAS) AF: 0.00 AC: 0 AN: 30204

South Asian (SAS) AF: 0.00 AC: 0 AN: 54075

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40506

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4136

European-Non Finnish (NFE) AF: 0.00000238 AC: 2 AN: 841952

Other (OTH) AF: 0.00 AC: 0 AN: 46085

GnomAD4 genome Cov.: 23

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.49
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Uncertain	0.13
CADD	Benign	17
DANN	Benign	0.97
DEOGEN2	Uncertain	0.70	D
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Benign	0.80	T
M_CAP	Uncertain	0.20	D
MetaRNN	Uncertain	0.71	D
MetaSVM	Uncertain	0.27	D
MutationAssessor	Uncertain	2.5	M
PhyloP100		0.14
PrimateAI	Benign	0.47	T
PROVEAN	Uncertain	-2.6	D
REVEL	Pathogenic	0.72
Sift	Benign	0.083	T
Sift4G	Benign	0.10	T
Polyphen		0.67	P
Vest4		0.64
MutPred		0.70		Gain of ubiquitination at K111 (P = 0.1497)
MVP		0.94
MPC		0.77
ClinPred		0.95	D
GERP RS		-0.075
PromoterAI		0.067	Neutral
Varity_R		0.57
gMVP		0.92
Mutation Taster		=82/18	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs886136735; hg19: chrX-47444724;